There are here in Japan... and I'm sure there will be wherever you are sooner or later. However, I wouldn't be too quick to hop along with video technology. As you can see by reading mosts posts, the masses are still having enough trouble with the format incompatiblities of the single-layer family of discs. Cool to make, but only you will be able to enjoy them... for the time being, anyway.
I have a Double-layer DVD burner on my PC. Can DL Discs(8.5GB) be played on home players? Are there any home units that can play these discs?